Time was winding down in the first period Saturday night at Scottrade Center and the Blues had all of the momentum against the visiting Dallas Stars.

They led 3-0 on goals by Carl Gunnarsson, Joel Edmundson and Jaden Schwartz and were about to take that cushion into the intermission.

But then Dallas’ Jamie Benn got the puck on his stick to the left of Blues goalie Jake Allen and had a give-me goal that would have sent the Stars into the locker room seeing some light. Allen turned it off by turning in a splendid glove save, the biggest of his 38 stops, as both he and the Blues improved to 2-0 this season.

“Just get across and get a glove on it,” Allen said. “He got some good wood on it. I just got a glove there.”

Benn’s scoring bid came with 7.7 seconds left in the opening period, allowing the Blues to maintain their three-goal lead. Allen stopped 29 straight shots by the Stars before losing his shutout in the...